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I'm new to regular expressions and came accros the following \d+ . I do not exactly know what this means, please point me in the right direction.
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The RegExp \D Metacharacter in JavaScript is used to search non digit characters i.e all the characters except digits. It is same as [^0-9]. Syntax: /\D/
match() function in Python. The match function is used to match the RE pattern to string with the optional flags. In this method, the expression “w+” and “\W” will match the words starting with a letter 'g' and after that, anything which is not started with 'g' is not identified.
\s stands for “whitespace character”. Again, which characters this actually includes, depends on the regex flavor. In all flavors discussed in this tutorial, it includes [ \t\r\n\f]. That is: \s matches a space, a tab, a carriage return, a line feed, or a form feed.
In normal regular expression grammar, (a+b)* means zero or more of any sequence that start with a , then have zero or more a , then a b .
\d is a digit (a character in the range 0-9), and + means 1 or more times. So, \d+ is 1 or more digits.
This is about as simple as regular expressions get. You should try reading up on regular expressions a little bit more. Google has a lot of results for regular expression tutorial, for instance. Or you could try using a tool like the free Regex Coach that will let you enter a regular expression and sample text, then indicate what (if anything) matches the regex.
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